What main features and functions should I look for In an electric impact garden shredder?

• Powerful electric motor, at least 1800W

• Strong cutting blades, hardened steel or equivalent

• A good cutting capacity, from 30mm to 40mm or more

• A good sized loading aperture

• Wheels for easy transportation

• Durable stand for stability in operation

• Decent length of cable supplied (3 metres at least)